Document
AIC1739
300mA Low Dropout Linear Regulator
n FEATURES
l
n DESCRIPTION
The AIC1739 is a 3-pin low dropout linear regulator. The superior characteristics of the AIC1739 include zero base current loss, very low dropout voltage, and 2% accuracy output voltage. Typical ground current no remains load to approximately 55µA, from
Low Dropout Voltage of 180mV at 100mA Output Current (3.0V Output Version). Guaranteed 300mA Output Current. Internal 1.3Ω Current. P-MOSFET Draws no Base
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Low Ground Current at 55 µA. 2% Accuracy Output Voltage of 1.8V/ 2.0V/ 2.5V/ 2.7V/ 3.0V. Input Voltage Range up to 12V. Needs only 1µF for Stability. Current and Thermal Limiting.
maximum loading conditions. Dropout voltage is exceptionally low. Output current limiting and thermal limiting are built in to provide maximal protection to the AIC1739 against fault conditions. The AIC1739 comes in the popular 3-pin SOT-89 and TO-92 packages.
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n APPLICATIONS
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Voltage Regulator for CD-ROM Drivers. Voltage Regulator for LAN Cards. Voltage Regulator for Microprocessor. Wireless Communication Systems. Battery Powered Systems.
n TYPICAL APPLICATION CIRCUIT
VIN V IN VOUT
AIC1739
V OUT
+
1µ F C IN
GND
+
10µ F C OUT
Low Dropout Linear Regulator
Analog Integrations Corporation DS-1739-01
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC TEL: 886-3-5772500 FAX: 886-3-5772510
www.analog.com.tw
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AIC1739
n ORDERING INFORMATION
AIC1739-XCX
PACKAGING TYPE X: SOT89 ZT: TO92 ZL: TO92
ORDER NUMBER
AIC1739-18CX AIC1739-20CX AIC1739-25CX AIC1739-27CX AIC1739-30CX (SOT-89) AIC1739-18CZT AIC1739-20CZT AIC1739-25CZT AIC1739-27CZT AIC1739-30CZT (TO-92) AIC1739-18CZL AIC1739-20CZL AIC1739-25CZL AIC1739-27CZL AIC1739-30CZL (TO-92 L TYPE)
PIN CONFIGURATION
FRONT VIEW 1: VOUT 2: GND 3: VIN
1 2 3
TOP VIEW 1 1: GND 2: VIN 3: VOUT 2 3
OUTPUT VOLTAGE 18: 1.8V 20: 2.0V 25: 2.5V 27: 2.7V 30: 3.0V
TOP VIEW 1 1: VIN 2: GND 3: VOUT 2 3
n ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage ...................................................… … … … ..… … .................. -0.3~12V Operating Junction Temperature Range .....… … … ........… … … … ................ -40°C~ 85 °C Storage Temperature Range ....................… … ......................… … … .............. -65°C~150 °C Power Dissipation SOT-89 Package ....… ...… ................. 0.5W TO-92 Package .....… … … … ............. 0.5W
n TEST CIRCUIT
Refer to the TYPICAL APPLICATION CIRCUIT
n
ELECTRICAL CHARACTERISTICS (Ta=25° C, CIN=1µF, C OUT=10µF, unless
otherwise specified.)
PARAMETER Output Voltage TEST CONDITIONS No Load AIC1739-30 AIC1739-27 AIC1739-25 AIC1739-20 AIC1739-18 (Note 1) VIN=4.0~12V VIN=4.0~12V VIN=4.0~12V VIN=4.0~12V VIN=4.0~12V MIN. 2.940 2.646 2.550 1.960 1.764 TYP. 3.000 2.700 2.500 2.000 1.800 50 MAX. 3.060 2.754 2.550 2.040 1.836 150 UNIT V
Output Voltage Temperature Coefficiency
PPM/°C
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AIC1739
n ELECTRICAL CHARACTERISTICS (Continued)
PARAMETER
Line Regulation Load Regulation (Note 2) Current Limit (Note 3) Dropout Voltage (Note 4) AIC1739s AIC1739-30 AIC1739-27 AIC1739-25 AIC1739-20 AIC1739-18 IO=0.1mA~IMAX IL=1mA
TEST CONDITIONS
VIN=4.0~12V VIN=5V, IL=0.1~300mA VIN=5V, VOUT=0V IL=0.1mA IL=300mA IL=300mA IL=300mA IL=300mA IL=300mA VIN=4~12V
MIN.
TYP.
3 7
MAX.
10 25
UNIT
mV mV mA
320
440 0.2 540 570 610 820 920 55 10 640 670 710 970 1070 80
mV
Ground Current Note 1: Note 2: Note 3: Note 4:
µA
Guaranteed by design. Regulation is measured at constant junction temperature, using pulse testing with a low ON time. Current limit is measured by pulsing a short time. Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below the value measured with a 1V differential.
n TYPICAL
1000 900 800
PERFORMANCE CHARACTERISTICS
Dropout Voltage vs Load Current V OUT=1.8V V OUT=2.0V
VOUT COUT=1µF VOUT =3.0V 100mV/DIV
Load Transient Response
Dropout Voltage (mV)
700 600 500 400 300 200 100 0 0 50 100 150 200 250 300
V OUT =2.5V VOUT=2.7V VOUT =3.0V
IOUT IOUT=0.1mA
IOUT=150mA
Load Current (mA)
Time (0.5mS/DIV)
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AIC1739
n TYPICAL
C OUT =10µF
PERFORMANCE CHARACTERISTICS (Continued)
Load Transient Response
COUT =1µ F I L=1mA
20mV/DIV VIN =6V VIN VIN =4.0V VOUT=3.0V
Line Transient Response
VOUT
IOUT=150mA I OUT =0.1mA VOUT I OUT VOUT=3.0V 20mV/DIV
Time (0.5mS/DIV)
Time (1mS/DIV)
Recommended max. Output Current vs. Input voltage
400 350
Dropout Voltage (mV)
300 250 200 150 100 50 0
3.0V 2.7V 2.5V 1.8V 2.0V
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4
5
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11
12
Input Voltage (V)
n BLOCK DIAGRAM
VIN VOUT
CURRENT LIMITING
ERROR AMP THERMAL SHUTDOWN
-
+
1.235V Reference
-
GND
4
AIC1739
n PIN DESCRIPTION
VOUT PIN - Output pin. GND PIN - Power GND. VIN PIN - Power Supply Input.
n APPLICATION INFORMATIONS
A 1µF (or greater) capacitor is required between the AIC1739 output and ground for stability. Without this capacitor the part will oscillate. Even though most types of capacitor m.